we've enjoyed our Moentrol shower which has a feature that keeps the water a constant temperature depsite other water use in the house - previous showers have gone hot with a toilet flush or cold if the dishwasher is running. However, recently, although the temperature has still remained constant, the pressure is greatly diminished. It's not diminished from any of our other faucets, just the shower. Anyone have this problem? Anyone know how to fix it?